head bolts APR, no contest
Never heard APR, whats that?
I use ARP. Automotive Racing Products.
SPS, also make good fasteners/studs, good enough for carrillo.
Also there is a contest, Raceware make bloody good fasteners for vw-audi porsche. They were good enough for Vw motorsport.
But at the end of the day, have you QTA4, had experience of and engine as discribed having head fastner trouble, with oem stuff? please share your experience and educate me. Thanks